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Introduction To Channel Steel

Channel steel channel steel is a long steel with groove section. Section steel with channel shape.
Introduction to channel steel
Channel steel is a kind of carbon structural steel for construction and machinery. It is a section steel with complex section, and its section shape is groove shape. Channel steel is mainly used in building structure, curtain wall engineering, mechanical equipment and vehicle production. In application, it is required to have better welding, riveting and comprehensive mechanical functions. The raw material for channel steel production is carbon steel or low alloy steel billet with carbon content not exceeding 0.25%. The finished channel steel is delivered in hot working, normalizing or hot rolling condition. For example, 100 * 48 * 5.3 indicates that the waist height is 100 mm, the leg width is 48 mm, and the waist thickness is 5.3 mm. For channel steel with the same waist height, if there are several different leg width and waist thickness, a B C should be added on the right side of the type to distinguish, such as 25 × a 25 × B 25 × C, etc.
Classification of channel steel
Channel steel is divided into general channel steel and light channel steel. The specification of hot-rolled general channel steel is 5-40 × 10. The specification of hot-rolled flexible channel steel supplied by both parties is 6.5-30 × 10. Channel steel is mainly used in building structure, vehicle production, other industrial structures and fixed cabinets, etc. channel steel is often used with I-beam.
According to the shape, channel steel can be divided into four types: cold-formed equilateral channel steel, cold-formed unequal side channel steel, cold-formed inner curled channel steel, cold-formed outer rolled edge channel steel. According to the theory of steel structure, the wing plate of channel steel should be stressed, that is to say, the channel steel should stand up instead of lying down.
Specification setting of channel steel
The specification of channel steel is mainly indicated by height (H), leg width (b) and waist thickness (d). At present, domestic channel steel specifications are from No.5 to No.40, that is, the corresponding height is 5-40cm.
At the same height, the light channel steel has narrower legs, thinner waist and lighter weight than ordinary channel steel. No. 18-40 is large channel steel, No. 5-16 channel steel is medium-sized channel steel. The imported channel steel shall be marked with the standard of practice and relevant specifications. The import and export order of channel steel is generally based on the specification required in application after the corresponding carbon steel (or low alloy steel) steel grade is determined. In addition to the specification number, channel steel has no specific composition and function series.
The delivery length of channel steel is divided into fixed length and multiple length, and the allowable difference is specified in corresponding specifications. The length selection scale of domestic channel steel can be divided into 3 types according to the specification number: 5-12m, 5-19m and 6-19m. The length of imported channel steel is generally 6-15m.
Channel steel No
① The chemical composition is indicated by the world chemical element symbol and the national symbol, and the component content is indicated by Arabic alphabet
For example, China and Russia 12CrNi3A
② Use fixed digit number to indicate steel series or numbers, such as USA, Japan, 300 series, 400 series and 200 series;
③ Use Latin letters and order to make up the serial number, which only indicates the use.
The import volume of channel steel plant in China is larger than that of export. It is divided into two channels: simple import and import with complete set of projects. In recent years, China's coastal ports (Dalian, Tianjin, Qinhuangdao, Lianyungang, etc.) are building and expanding oil, coal, grain and other large import and export products active loading and unloading projects. Along with the introduction of main equipment, the import volume of large channel steel is also increasing. The main producing countries and regions are Japan, Russia and Western Europe. Export channel steel is mainly exported to Hong Kong and Macao
Angle steel, commonly known as angle iron, is a long piece of steel whose two ends are straight into an angle. There are equilateral angle steel and unequal angle steel. The two sides of an equilateral angle are equal in width. The specification is indicated by the MM number of side width × side width × side thickness. If "∟ 30 × 30 × 3", it means that the edge width is 30 mm and the side thickness is 3 mm. It can also be indicated by type that the type is the centimeter number of side width, such as ∟ 3 ා. The type does not indicate the dimensions of different side thicknesses in the same type. Therefore, the edge width and thickness of angle steel shall be filled out completely in the uniform documents, so as to prevent separate indication by type. The specification of hot-rolled equilateral angle steel is 2 × 10-20 × 10. Angle steel can be used to form different stress components according to different requirements of structure, and can also be used as the connection between components. It is widely used in various building structures and engineering structures, such as beams, bridges, transmission towers, lifting and conveying machinery, ships, industrial furnaces, reaction towers, container racks and warehouses.